Form for casting a lining in a conduit

ABSTRACT

This invention relates to mold forms for, and a method of, casting a lining in a conduit and, more particularly, to an improved mold form for casting refractory linings in the conduit sections of a blast furnace. The form for casting a lining in a conduit having a predetermined nonlinear conduit shell has a form shell substantially similar in contour to the conduit shell, and a locating member secured to one end of the conduit shell and to the form shell to support the form shell, to align the form shell with the conduit shell to define a lining cavity between the conduit shell and the form shell, and to close the one end of the lining cavity. The method of casting a lining in a conduit having a predetermined nonlinear conduit shell includes the steps of securing a form shell to one end of the conduit shell to support the form shell, to align the form shell with the conduit shell to define a lining cavity between the conduit shell and the form shell, and to close the one end of the lining cavity, and casting a refractory lining in the lining cavity.

United States Patent [72] Inventors Malvern H. Culp;

August Giovanni, both of Youngstown, Ohio [21] Appl. No. 805,979

[22] Filed Feb. 24, 1969 [45] Patented Dec. 14, 1971 [73] Assignee United States Steel Corporation [54] FORM FOR CASTING A LINING IN A CONDUIT 5 Claims, 21 Drawing Figs.

l63-l72, 184, I85, I86; 264/30, 259, 267, 269;

25/126,128, 38, 130 A, 1A; l8/DIG. l0; 164/33;

Assistant Examiner-Lucius R. Frye Attorney-Robert J. Leek, Jr.

ABSTRACT: This invention relates to mold forms for, and a method of, casting a lining in a conduit and, more particularly, to an improved mold form for casting refractory linings in the conduit sections of a blast furnace.

The form for casting a lining in a conduit having a predetermined nonlinear conduit shell has a form shell substantially similar in contour to the conduit shell, and a locating member secured to one end of the conduit shell and to the form shell to support the form shell, to align the'form shell with the conduit shell to define a lining cavity between the conduit shell and the form shell, and to close the one end of the lining cavity.

The method of casting a lining in a conduit having a predetermined nonlinear conduit shell includes the steps of securing a form shell to one end of the conduit shell to support the form shell, to align the form shell with the conduit shell to define a lining cavity between the conduit shell and the form shell, and to close the one end of the lining cavity, and casting a refractory lining in the lining cavity.

[56] References Cited UNITED STATES PATENTS 1,049,112 12/1912 Loveetal... 25/130A 1,430,562 10/1922 Kluge 249/185 X 167,021 8/1875 Reid 1. 249/185 536,204 3/1895 Harrington 249/87 X T 22:! ZZc/a I j K 2212/:

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sum E OF 6 INVENTORS MALI/ERA! H. CULP 8 AUGUST GUI/ANN] BACKGROUND OF THE INVENTION I-Ieretofore, in the installation of a refractory lining in the conduit section between the bustle pipe of a blast furnace and the blow pipe, it has been customary to utilize fixed welded metal forms to cast such refractory lining. These fixed forms had to be destroyed by torch burning or the like and were not readily collapsible or reuseable.

OBJECTS OF THE INVENTION It is the general object of this invention to avoid and overcome the foregoing and other difficulties of and objections to prior art practices by the provision of an improved method of, and an improved form for, casting linings in a conduit system, which improved form:

I. is simple and rugged in construction;

2. is readily collapsible and removable from the conduit system after the casting operation; and

3. is reusable in the conduit system during a long operational life for repeated relining of the conduit system.

BRIEF SUMMARY OF THE INVENTION The aforesaid objects of this invention, and other objects which will become apparent as the description proceeds, are achieved by providing an improved method of, and form for, casting a lining in a conduit having a predetermined nonlinear shell. The form has a form shell substantially similar in contour to the conduit shell and a locating member secured to one end of the conduit shell and to the form shell to support the form shell, to align the fonn shell with the conduit shell to define a lining cavity between the conduit shell and the form shell, and to close the one end of the lining cavity.

The method of casting a lining in a conduit having a predetermined nonlinear conduit shell includes the steps of securing a form shell to one end of the conduit shell to support the form shell, to align the form shell with the conduit shell to define a lining cavity between the conduit shell and the form shell, and to close the one end of the lining cavity, and casting a refractory lining in the lining cavity.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS For a better understanding of this invention reference should be had to the accompanying drawings, wherein like numerals of reference indicate similar parts throughout the several views and wherein:

FIG. 1 is a fragmentary sectional view of a bustle pipe, a blow pipe, a tuyere stock for connecting the bustle pipe to a blow pipe, the tuyeres on the end of the blow pipe and a portion of brickwork of the blast furnace adjacent the tuyere;

FIG. 2 is a fragmentary sectional view of the upper portion of the tuyere stock showing the upper section of the form secured to such upper portion;

FIGS. 2A-2D are sectional views along the lines IIA-IID of FIG. 2 in the direction of the arrows;

FIG. 3 is a fragmentary sectional view of the middle portion of the tuyere stock showing the middle form shell secured to such middle portion;

FIGS. 3A-3E are sectional views taken along the lines IIIA-IIIA, etc., of FIG. 3 in the direction of the arrows;

FIG. 4 is a fragmentary sectional view of the lower portion of the tuyere stock showing the lower fonn shell secured to such lower portion;

FIGS. 4A-IG are sectional views taken along the lines IVA-IVA, etc., of FIG. 4 in the direction of the arrows; and

FIG. 4H is a side elevational view of a forming jig used to shape the upper portion of the cast refractory lining in the lower form shell.

Although the principles of this invention are broadly applicable to the casting of a lining in a hollow body, this invention is particularly adapted for use in conjunction with the casting of a refractory lining in a conduit portion of a blast furnace and hence it has been so illustrated and will be so described.

DETAILED DESCRIPTION With specific reference to the form of this invention illustrated in the drawings, and referring particularly to FIG. I, a bustle pipe of a blast furnace (not shown) is indicated generally by the reference numeral III.

For the purpose of permitting the discharge of a heated fluid, such as air, from the bustle pipe III, such bustle pipe I0 is provided with an outlet I2 (FIG. I). So that such heated air may be conducted to a tuyere M (FIG. I) mounted on brickwork I5 of the blast furnace (not shown), a tuyere stock In (FIG. I) extends from such outlet I2 througha blowpipe I8 (FIG. I) to the tuyere II. As shown in FIG. I, the tuyere stock I6, has an upper portion or upper conduit shell which fits into the outlet I2 of the bustle pipe and terminates in a flange ItiaI; a middle portion or middle conduit shell 16!; having an upper flange I6bll, (which flange MM is bolted through a filler ring 19 to the flange ItiaI) and terminates in a spherical ring Ifib2; and a lower portion or lower conduit shell llfic extending from a spherical seat IficI (in engagement with the spherical ring I6b2) to a lower flange I6c2. So that a peepsight may be provided into the tuyere II, the lower portion Ific of the tuyere stock I6 is provided with a peepsight inlet I603 (FIG. I) in alignment with the blow pipe I8 and tuyere Id. The lower flange I6c2 (FIG. I) of the lower section 161: is bolted through a filler ring I9a to an adjacent flange seat I8a associated with the blowpipe IS, which blowpipe I8 of course extends to the adjacent tuyere M.

In order to provide the tuyere stock I6 with a castable refractory lining 20 (FIG. 1), suitably for example of Glasrock S 820 castable refractory manufactured by the Glasrock Products Inc., Atlanta, Georgia, an improved collapsible, reusable form (FIGS. I, 2, 3, 4) of this invention is employed.

This fon'n for casting the refractory lining 20 into the tuyere stock I6 (which has a predetermined nonlinear shell or contour) has (similar to the tuyere stock I6) three sections, an upper section or upper form shell 22a (FIG. 2), a middle section or middle form shell 22b (FIG. 3) and a lower section or lower form shell 22c (FIG. 4).

UPPER FORM SHELL 220 As shown in FIG. 2, the upper form shell 22a is substantially similar in contour to the upper conduit shell I60 and has a locating member 2201 (FIGS. 2, 2A) secured to one end of the upper conduit shell Ida (in this case the lower end of the upper conduit shell 26a) by bolts 2202 and nuts 2202' and to the upper form shell 22a by a bolt 22a3 and 22a3. This bolt 22a3 extends through a cover plate 22nd (FIGS. 2, 2A) on the locating plate 22aI and an end plate 22115 (FIGS. 2, 25) on the lower end of a first section 2M6 (FIGS. 2, 2B) of the upper form shell 22a. The upper end of the first section 2246 (as viewed in FIG. 2) has an end plate 22a7 (FIGS. 2, 2C) secured by bolts 22a2 and nuts 22a2 to an end plate 22a8 (FIGS. 2, 2D) of a second section 22419 of the upper form shell 22a. This second section 2209 is of split: half-construction having half-sections 22a9a, 22a9b (FIG. 2D). Each half as shown in FIG. 2 has ears 22419121, which ears 22a9aI are secured together by bolts 2202 and nuts (not shown in FIG. 2) and has a reinforcing bar 22a9a2 and handles 2209a 3.

The locating member 22aI (FIGS. 2, 2A) and the cover plate 22114 support the upper form she'll 22a, align the upper form shell 22a with the upper conduit shell Ifia to define a lining cavity 22a Ill (FIG. 2) between the upper conduit shell Itia and the upper form shell 22a, and close one end of the lining cavity 22am (i.e., in this case the lower end, FIG. 2).

ALTERNATIVE EMBODIMENTS It will be understood by those skilled in the art that altematively, as shown in FIGS. 3, SA-3E, a middle form shell 22b may be employed.

MIDDLE FORM SHELL 22b The middle fonn shell 22b (FIG. 3) has a top locating member or plate 22bl (FIGS. 3, 3A) secured by welding to a third section (or a first section) 22b 2 of the middle form shell 22b as by welding (FIGS. 3, 3A). This locating member 22bl is secured by bolts 22b3 and nuts 22b4 through a spacer ring 22b5 (FIG. 3) to the flange 16bl of the middle form shell 16b. It will be noted that the locating member 22bi is relatively thin to permit cast lining of the lining cavity 22bl0 from this upper end of the middle form shell 22b. Beneath the locating member 22M a handle 22b6 (FIGS. 3, 3A) is provided. As shown on FIGS. 3, 3B, the third section 22b2 has an end plate 22b7 having bolt holes 22b7a, which holes 22b7a align with bolt holes 22b8a in end plates 22b8 (FIGS. 3, 3C) of a fourth section (or a second section) 22b9 of the middle form shell 22b. Bolts 22b4 and nuts 22b3 secure the plates 22127, 22 b7 together.

As shown in FIGS. 3, 3C, 3D, this fourth section 22b9 has four opposed sections 22b 9a hinged together at 22b9b and two of such hinges 22b9b have removable pins 22b9c (FIG. 3C) to permit the facile collapse and removal of such fourth section 22b9.

Referring to the lower portion of the fourth section 22b? shown in FIGS. 3, 3D, such four sections 22b9a each have a lower end plate 22b! 1 (FIG. 3D) provided with holes 22bl la, which holes 22blla register with aligned holes 22bll2a (FIG. 3E) in a second alignment member 22bl2 to permit securement together of the end plates 22bl 1 to the second alignment member 22b12 by bolts 22b3 and nuts 22b4. Locating lugs 22bl2b on the second alignment member 22b12 engage the spherical ring I6b2 (FIGS. 1, 3) to align the lower end of the middle fonn shell 22b in the middle conduit section 16b.

LOWER FORM SHELL 160 As shown in FIG. 4 the lower fonn shell 220 has a top portion or first portion 2201, a middle portion or second portion 2202 and a lower portion or third portion 2203. For the purpose of securing the lower form shell 220 in the lower portion 160 of the tuyere stock 16 and aligning such lower form shell 220 in such lower portion 160 while pennitting access for the castable refractory lining 20 (FIG. 1) in the lining cavity 22010, a third locating member 2201a (FIGS. 4, 4A) has its legs 2201b (FIG. 4A) seated in bifurcated lugs 2201c (FIG. 4), extending from the sidewalls of the lower sections 160 of the tuyere stock 16. In addition, a bridge 220Id (FIGS. 4, 4A) of the third locating member 2201a has its legs 2201e secured to ears 2201 f (FIGS. 4, 48) extending from the top section 2201 of the lower form shell 220 by bolts (not shown) extending through holes 2201 h (FIG. 4) in such ears 220Ifand nuts (not shown). Referring to FIG. 4B, the top section 2201 is generally round and is provided with a flexing split 2201 j to permit flexing of such top section 2201. So that the top section 2201 may be secured to the middle section 2202, such top section 2201 is provided at its lower end (as viewed in FIGS. 4, 48) with a plurality of end sections 220! having holes 220lm (FIG. 43) therein. These holes 220lm align with holes 2202a (FIGS. 4, 4C) in end sections 2202b (FIG. 4C) in the three split sections 22020 of middle section 2202 of the middle portion 220 of the lower form shell 220,which split sections 22020 are split at 2202d (FIG. 4C) and hinged at 22020 with a removable pin 2202f therein. Bolts 2202g (FIG. 4) extend through the holes 220lm (FIG. 4B) in top section 2201 and holes 2202a (FIG. 4C) in middle sections 2202 and nuts 2202!: (FIG. 4) secure the two sections together. A window 2202L (FIG. 4) is provided in one of the sections 22020 for use as hereinafter explained.

FIGS. 4, 40 show three end plates 2202m in the lower end of the middle section 2202, substantially identical to the end plates 2202b in the upper portion of middle section 2202.

In order to integrate the end plates 2202m (FIGS. 4, 4D) with end plates 2203a (FIGS. 4, 4E) of the lower section 2203, an H-plate2203b (FIGS. 4, 4E) is disposed therebetween and is provided with holes 22030 (FIG. 4E). Bolts 2203d (FIG. 4)

extend through holes 2202a (FIG. 4D) in end plates 2202m (FIGS. 4, 4D) holes 2203c (FIG. 4E) in H-plate 2203b and holes 2203:? (FIG. 4) in end plates 2203a and are secured therein by nuts 22030 (FIG. 4).

As shown in FIGS. 4, 4F, the lower section 2203 has three portions 2203;(FIG. 4B) which are separated by splits 2203f two of such portions being hinged at 2203 by a removable pin 220311. The right-hand portion of the lower section of the tuyere stock 16, as viewed in FIG. 4, has a flange 16010 to which is secured, as by bolts 2203d and nuts 22c3e,a locating plate 220301 (FIGS. 4, 4F) having holes 2203p provided with a locating ring 22c3n fitting over the right-hand portion of the lower section 2203 of the lower form shell 220 to permit casting of the lining at both ends of the lower form shell 220.

Referring now to the left-hand portions of FIG. 4, a spiral form 2204 having a clockwise spiral 2204a and handle 2204a is inserted (clockwise to loosen and then counterclockwise to tighten) into a window 2204b (FIGS. 4, 4G) in a guide 22040 (FIGS. 4, 46) on the peepsight inlet 1603, (FIGS. 1, 4) and the window 2202L (FIG. 4) in the middle section 2202 of the lower mold shell 220. The guide 22040 (FIGS. 4, 40) has locating lugs 222041! (FIGS. 4, 4G) which lock into bifurcated lugs 22040 on the inlet 1603. The guide 22040 permits cast lining of the refractory 20 through the inlet I603 into the inlet lining cavity 220 4f FIG. 4).

After the refractory lining 20 is cast into the lining cavities 22010, 2204f, the locating member 2201a (FIGS. 4, 4A) is removed and a forming jig 2205 (FIG. 4H) having a pivot bar 2205a is seated on the spherical seat 1601 (FIG. 4) and rotated to form the lining 20 to the configuration indicated by the dotted lines in the upper portion of FIG. 4.

METHOD It will be understood'by those skilled in the art from the above description of the form that an improved method is also provided including the steps of:

1. securing the form shell 22 to one end of the conduit shell 16 to support the form shell 22, to align the form shell 22 with the conduit shell 16 to define a lining cavity 22al0 (FIG. 2), etc., between the conduit shell 16 and the fonn shell 22, and to close the one end of the lining cavity 22al0 (FIG. 2), etc., and

2. casting a refractory lining 20 in the lining cavity 22810 (FIG. 2), etc.

SUMMARY OF THE ACHIEVEMENT OF THE OBJECTS OF THE INVENTION It will be recognized by those skilled in the art that the objects of this invention have been achieved by providing an improved form for and method of casting a lining 20 in a conduit 16 having a predetermined nonlinear conduit shell 16, which form 22 is simple and rugged in construction, is readily collapsible and removable from the conduit system after the casting operation, and is reusable in the conduit system during a long operational life-for repeated relining of the conduit system.

While in accordance with the patent statutes a preferred and alternative embodiment of this invention has been illustrated and described in detail, it is to be particularly understood that the invention is not limited thereto or thereby.

We claim:

I. A form for casting a refractory lining in a conduit having an arcuate conduit shell, said form having:

a. a form shell substantially similar in contour to said conduit shell;

b. a locating member secured to one end of said conduit shell and to said form shell to support said form shell, to align said form shell with said conduit shell to define a lining cavity between said conduit shell and said fonn shell and to close said one end of said lining cavity; and

c. said form shell having a first section secured at one end to said locating member and a second section secured at the other end of said first section;

section for securement to said first section, hinge means disposed between two of said three sections, and a removable pin disposed in said hinge means.

5. The form recited in claim 3 wherein said third section has three sections and having each section provided with an end section for securement to said second section, hinge means disposed between two of said three sections, and a removable pin disposed in said hinge means.

mirth STATES Mimi @WMIE QCERTWMMFE @IF QRREQWN Patent No. 3,627,256 Dated December 1 4, 1971 Inve t Malwm H Quip @t at It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

0n the cover page time n. camel "Murrow United statm Steel floomtion m Signed and mailed time with may of October" 1972 M mFLTCim JR. EE GOSGLK Atteetihg Offioer Gommiwiomror Patemae "ORM PO-1050(10-69) USCOMM-DC 6O376-P89 u,s. GOVERNMENT PRINTING OFFICE: 1969 0-386-334. 

1. A form for casting a refractory lining in a conduit having an arcuate conduit shell, said form having: a. a form shell substantially similar in contour to said conduit shell; b. a locating member secured to one end of said conduit shell and to said form shell to support said form shell, to align said form shell with said conduit shell to define a lining cavity between said conduit shell and said form shell and to close said one end of said lining cavity; and c. said form shell having a first section secured at one end to said locating member and a second section secured at the other end of said first section; d. said conduit shell having an inlet and said form shell being provided with a window and having a form in said window, said form and said inlet defining an inlet cavity.
 2. The form recited in claim 1 and having a guide for said form mounted on said inlet.
 3. The form recited in claim 1 and having a third section secured to said second section.
 4. The form recited in claim 1 wherein said second section has three sections and has each section provided with an end section for securement to said first section, hinge means disposed between two of said three sections, and a removable pin disposed in said hinge means.
 5. The fOrm recited in claim 3 wherein said third section has three sections and having each section provided with an end section for securement to said second section, hinge means disposed between two of said three sections, and a removable pin disposed in said hinge means. 